Mold or case holder for use in electrotyping



May 30, 1950 w. F. CARL 2,509,722

MOLD 0R CASE HOLDER FOR USE IN ELECTROTYPING Filed May l1, 1946 llllflfl Q A s Patented May 30, 1950 UNITED STATES asoma;

MOLD R CASE AHOLDER FOR.=USE

IN ELECTROTYBING Witliam .F- Ca-rl De? MQW-i :19V-af Application May 11, 1946,.Se11ial.No. 669,093 2.01am 01-294e2n sion lead. lIjlovvever, 4the art has` recently turned .to the use ,offllplasticpinateialsftheifeby eliminatgmaths rather 510W and @easily lwxl gliphiij! and impara lashed gleitet In either case largeplating baths areemployed, e, the ilse 0f @Dpef pliis tanks and' liikel plating baths! After al1 cf the preliminary" 011- molds or cases that materially eliminates the undesirable marginal edge nuggets formed durins .the platinabath.

A Still further.Qbieatpthis:invention iS .t0 provide marsinalrimmcldrr aseholders that may be quickly andgasilyinstalled@ remord These and `ojtljiner objects `will be apparent to those skilled inthe art.

Mv invaliden .eqnsisis ,in the ceramici/i911, afrangement and combination of the various parts of the device, whereby the objects contemplated are attained as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, in which:

Fig. 1 is a front view of two of my devices placed around the side marginal -edges of two cases.

Fig. 2 is an enlarged plan View of one of my devices being placed on the marginal edge of a case or cases.

Fig. 3 is an enlarged cross-sectional view of the device taken on line 3 3 of Fig. 1 and more fully illustrates its construction.

Fig. 4 is an enlarged longitudinal sectional view of one of my devices.

While my holders may be successfully used for many purposes where it is desired to embrace the marginal edges of one or more sheets, it is particularly adapted for use in holding sheet plates suspended in plating baths and this is particularly true in the process of electrotyping and stereotyping. Electrotyping has been found to be the answer in modern printing surface duplication, especially in regard to volume and speed required in production at minimum cost. Even in the printing of newspapers in great volume it is necessary for many duplicate plates to be made in order that several presses may accomplish the printing. Electrotyping in its application to printing is therefore a process that duplicates the form of type, the engraving of any combination of relief printing surfaces into a composite plate, or as many multiples of each composition as the capacity of the presses require and the volume of work necessitates. The most common type of electrotyping employs wax, graphite, and imprescrater. fhe resultA ,tuffi issupiiortdori a rddgbove the rank throghfivhich lect citv llows ,from an electric 3 itself ,uspenddin the i A thetank` 'lheplatmg material such'as hopper, icfkelgor like-gis alsjointhe tank and epri- Iletd (with einer .iolepf the electric geni- V p selectroly`sis fand plating With the plating being "deposited on the`face of the mold or case. The problem arises from the necessity of keeping the liquid in the plating tank agitated. This is accomplished either by pumping the solution until positive circulation is set up or by forcing air into the iluid. With the fluid in constant agitation it is a considerable task to keep a plurality of the molds or cases suspended in the tank properly spaced apart from each other and from striking each other. I have overcome this problem by my device, and which I will now describe in detail.

Referring to the drawings, I have used the numerals Ill and I I to designate two molds or cases to be plated. Although not shown in the drawings, the faces of these two cases are irregular to provide the desired characters or indicia. The numeral I2 designates the supporting metal clamp engaging the tops of these two cases and supporting it on the rod I3 above the plating bath as shown in Fig. 1. By placing the two cases back-to-back, two cases may be plated at one time suspended from a single member I2. The numeral I4 designates my holder made of rubber or like flexible resilient material.

The numeral I5 designates a longitudinal slit opening in one side of the block member I4 designed to embrace the marginal edge of one or more cases. The numeral I6 designates a plurality of evenly spaced apart slits cut in the member I4 and extending across the side of the member I4 in which the longitudinal slit opening I5 is situated. These cuts I5 communicate with the slit opening I5 and extend transversely thereof, as shown in the drawings. The transversely arranged cuts I6 aid in making the member I4 more flexible and permitting its easy removal or placement on a case or cases as shown in Fig. 2. In constructing the member I4 the depth of the slit I5 is substantially greater than that of the cuts I6 in order that the molds or cases will tighten Within the device after they are forced in a distance beyond the bottoms oi the slits I6 as shown in Fig. 3. These members I4 may be placed substantially around the marginal edges of the cases, but in Fig. 2 I show them on the two side edges of the cases with the members I4 extending vertically when the cases are suspended within the plating bath. With the members I4 so placed the tWo cases Will be held securely back-to-back and sulcient Weight will be added by the use of the members Ill that the cases will be held against undesirable movement `in the tank during the time the plating bath is being agitated as herebefore explained. Obviously, during the plating process, many cases are suspended Within the plating bath parallel with each other and even if by accident or agitation one case were to move toward another suspended case the rubber members Ill would rst engage each other and prevent the two sets of cases from engaging each other.

Another advantage of my device is the prevention of undesirable nuggets `forming on the side edges of the cases. These nuggets would other- Wise have to be removed, thereby requiring extra effort and time and Waste of material. With the use of my device the marginal edges of the cases that are protected by members I4 Will be free from the formation of such incrustations.

Some changes may be made in the construction and arrangement of my improved mold or case holder for use in electrotyping Without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modied forms of structure or use oi mechanical equivalents which may be reasonably included within their scope.

I claim:

1. In a mold holder for use in electrotyping, an elongated flexible resilient member substantially rectangular in cross section having a longitudinal slit opening, and a plurality of spaced apart cross cuts communicating with said firstmentioned longitudinal slit opening; said cross cuts each having a depth less than the depth of said longitudinal slit opening.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS- Number Name Date 433,107 Tollner July 29, 1890 1,837,775 Howard Dec. 22, 1931 1,903,541 Bailey Apr. 11, 1933 1,994,144 Merrill Mar. 12, 1935 2,191,775 Sanderson Feb. 27, 1940 2,226,354 Barr Dec. 24, 1940 2,343,161 Tetrault Feb. 29, 1944 

